Sustainable Energy Technologies and Assessments最新文献

Economic assessment of acetaldehyde production from oxidative dehydrogenation of bioethanol through chemical looping air separation 通过化学循环空气分离法氧化脱氢生物乙醇生产乙醛的经济评估

IF 7.1 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2024-09-14 DOI: 10.1016/j.seta.2024.103967

引用次数: 0

A comprehensive understanding on industrial waste oil pyrolysis upgrading process: Physicochemical properties, pyrolytic behavior, kinetics, and thermodynamics 全面了解工业废油热解升级工艺：物理化学特性、热解行为、动力学和热力学

IF 7.1 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2024-09-14 DOI: 10.1016/j.seta.2024.103956

{"title":"A comprehensive understanding on industrial waste oil pyrolysis upgrading process: Physicochemical properties, pyrolytic behavior, kinetics, and thermodynamics","authors":"","doi":"10.1016/j.seta.2024.103956","DOIUrl":"10.1016/j.seta.2024.103956","url":null,"abstract":"<div><p>A growing interest has turned to in research to convert waste oil into sustainable energy. Under such circumstances, it was fundamental to investigate the physicochemical properties, pyrolytic characteristics, kinetics and thermodynamics for industrial waste oil (IWO) non-isothermal pyrolysis via multiple analyses. Results indicated that the high density (0.87 g/cm<sup>3</sup>) and viscosity (17.64 Pa·s@30 °C) for IWO were mainly attributed to the obvious heavy fraction proportion (∼20 %) and component deterioration. It mainly underwent the cracking stage with major mass loss (70 wt%), while the residue was attributed to the coking process. Besides, an obvious influence was presented for heating rate on pyrolytic behaviors, involving threshold, peak, and termination temperatures, maximum mass loss rate, and heat flow variation. Moreover, differential and integral model-free methods were comparatively applied to determine kinetic parameter variation with conversion, and the calculated pyrolytic activation energies were respectively 146.08–322.70 kJ/mol and 102.15–284.20 kJ/mol. For specific conversions, the pre-exponential factor obviously compensated for the activated energy, and Pearson correlation analysis further supported to these findings. Furthermore, the change in thermodynamic parameters with conversion and heating rate revealed endothermic and non-spontaneous for IWO pyrolysis. Via this research, it would enrich the understandings on the thermal decomposition and utilization of waste oil into sustainable energy.</p></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":null,"pages":null},"PeriodicalIF":7.1,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142232500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integration of biofuel-induced electricity generators (BEGs) with wearable biosensing devices 生物燃料诱导发电装置（BEG）与可穿戴生物传感设备的整合

IF 7.1 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2024-09-14 DOI: 10.1016/j.seta.2024.103975

引用次数: 0

Energy management optimization of a gravitational energy harvester powering wireless sensor nodes for freight trains monitoring 优化为货运列车监控无线传感器节点供电的重力能量收集器的能源管理

IF 7.1 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2024-09-13 DOI: 10.1016/j.seta.2024.103964

{"title":"Energy management optimization of a gravitational energy harvester powering wireless sensor nodes for freight trains monitoring","authors":"","doi":"10.1016/j.seta.2024.103964","DOIUrl":"10.1016/j.seta.2024.103964","url":null,"abstract":"<div><p>Energy harvesting is a promising solution for the realization of self-powered wireless sensor nodes (WSNs), minimizing battery waste and environmental impact. The harvesting devices studied in this paper are gravitational vibration-based energy harvesters (GVEHs), converting the ultra-low-frequency ambient vibrations of structures or vehicles into electric power. The main efficiency losses are related to the AC/DC rectification and battery storage processes. Experimental tests confirm the optimized layout of negative voltage converter (NVC) using MOSFETs and a schottky diode with a 1000 <span><math><mi>μ</mi></math></span>F smoothing capacitor, achieving power rectification efficiency of 65%. The rectified and smoothed power is stored in a Li-Ion 3.6 V 40 mAh coin cell and supplied to the load, consisting of a 3.3 V micro-controller unit, temperature sensor and sub-GHz wireless communication module. A nano power boost charger with buck converter manages power between the battery and the load. Experimental battery charge tests are performed for charging power evaluation at different external excitation amplitudes and frequencies. WSN average power consumption is analyzed with master–slave communication tests at different signal strengths and relative distances between the nodes. Finally, a duty cycle between active and sleep phase is defined to guarantee continuous activity of the WSN and net positive charge to the battery.</p></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":null,"pages":null},"PeriodicalIF":7.1,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213138824003606/pdfft?md5=ed7e07ecb66a83785ba43e04d5a1f5de&pid=1-s2.0-S2213138824003606-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142228745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Minimizing liquid/solid interfacial energy boosts Fe−N doping inside hollow carbon sphere for oxygen reduction in membrane-less direct formate fuel cell 将液体/固体界面能量降至最低可促进空心碳球内的 Fe-N 掺杂，从而在无膜直接甲酸酯燃料电池中实现氧气还原

IF 7.1 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2024-09-11 DOI: 10.1016/j.seta.2024.103957

{"title":"Minimizing liquid/solid interfacial energy boosts Fe−N doping inside hollow carbon sphere for oxygen reduction in membrane-less direct formate fuel cell","authors":"","doi":"10.1016/j.seta.2024.103957","DOIUrl":"10.1016/j.seta.2024.103957","url":null,"abstract":"<div><p>Porous hollow carbon sphere (HCS) is an attractive catalyst support for oxygen reduction reaction (ORR) due to its large specific surface area for active site anchoring, porous and hollow structure for active site exposure and mass transfer. However, due to the high transfer resistance for exogenous heteroatoms into HCS, most of active sites are usually loaded on the outer surface of HCS, leading to the decrease of active site density and the aggregation of heteroatomic particles. In this work, we proposed that accompanied with the decrease of liquid/solid interfacial energy by changing solvent composition during impregnation, penetration of exogenous heteroatoms-containing solution was facilitated in HCS, resulting in increased density of uniformly-dispersed Fe−N<sub>x</sub> active site by 58 %. Taking advantage of high-content and well-dispersed active site, structure-derived porosity for ion transfer and active site exposure, this HCS-derived catalyst (Fe-HCS@C<sub>2</sub>H<sub>5</sub>OH) exhibited positive onset and half-wave potentials of 0.953 V and 0.901 V (vs. RHE), as well as high power density of 20.17 ± 0.31 mW cm<sup>−2</sup> when applied in membrane-less direct formate fuel cell cathode, surpassing those of commercial Pt/C and the state-of-the-art carbonaceous catalysts. This strategy of interfacial energy control provides a new stepping-stone for the synthesis of high-performance electrocatalysts.</p></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":null,"pages":null},"PeriodicalIF":7.1,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142168462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Designing a novel ternary transition metal sulfide electrode for high-performance structural supercapacitors 为高性能结构超级电容器设计新型三元过渡金属硫化物电极

IF 7.1 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2024-09-05 DOI: 10.1016/j.seta.2024.103955

引用次数: 0

Flow-induced vibration of turbo-expander impellers for industrial waste heat recovery: An analysis based on two-way fluid structure interaction 用于工业余热回收的涡轮膨胀叶轮的流动诱导振动：基于双向流体结构相互作用的分析

IF 7.1 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2024-09-02 DOI: 10.1016/j.seta.2024.103953

{"title":"Flow-induced vibration of turbo-expander impellers for industrial waste heat recovery: An analysis based on two-way fluid structure interaction","authors":"","doi":"10.1016/j.seta.2024.103953","DOIUrl":"10.1016/j.seta.2024.103953","url":null,"abstract":"<div><p>In the effort to conserve energy and reduce emissions, waste heat recovery for power generation offers a significant advantage by enabling energy recycling. The turbo-expander, a critical component within expansion power generation systems, plays a pivotal role. However, flow during various operation can generate vibrations that negatively affect operational efficiency and trigger safety hazards. Therefore, studying the flow-induced vibration of the turbo-expander is of significant value. We apply computational fluid dynamics (CFD) and transient structural mechanics to examine the flow-induced vibration characteristics of the turbo-expander influenced by stator-rotor interaction using a two-way fluid structure interaction (FSI) strategy. The flow field modeling and calculation approach discussed here is validated through actual operating data from a prototype. Subsequent stages involve coupling the steady-state flow field with the structural field and performing pre-stress modal analysis on the impeller. In the end, we integrate flow-induced excitation from flow field calculations with the transient structural field to calculate the impeller’s flow-induced vibration at the expansion end of the turbo-expander. Our analysis reveals that guide vane frequency (3267 Hz), its harmonic frequencies, and pre-stress modal frequency (1465 Hz) prominently manifest in pressure pulsation and the dynamic response of the turbo-expander impeller under the influence of stator-rotor interaction.</p></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":null,"pages":null},"PeriodicalIF":7.1,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142128720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The population growth model of electrostatic charges: A novel concept for engineering optimal performance triboelectric nanogenerators 静电荷种群增长模型：设计最佳性能三电纳米发电机的新概念

IF 7.1 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2024-09-01 DOI: 10.1016/j.seta.2024.103951

{"title":"The population growth model of electrostatic charges: A novel concept for engineering optimal performance triboelectric nanogenerators","authors":"","doi":"10.1016/j.seta.2024.103951","DOIUrl":"10.1016/j.seta.2024.103951","url":null,"abstract":"<div><p>Lateral sliding triboelectric nanogenerators LS-TENGs promise to combine low cost and high-efficiency mechanical energy harvesting at low frequency with the advantages of light weight and simple device architecture. To date, device power generation optimization has only been addressed on the framework of the optimal load resistance through the maximum power transfer theorem (MPTT). However, MPTT is a concept to optimize the power transferred from TENGs to loads, but not for optimizing the power generated by the TENG itself. In response, this work reports a concept that resembles the population growth model of species for designing enhanced performance LS-TENGs with optimal charge-generating rate. In this way, devices designed under the proposed concept possess a significantly enhanced optimal charge and power generation rate up to 3-fold and 8-fold respectively superior to those found for conventional rectangular TENGs with similar capacity, which allows us power up sustainably for hours low power consumption devices with a few minutes of mechanical energy harvesting. Thereby, this model aids in the development of enhanced performance LS-TENGs capable of collecting mechanical vibrations and optimally converting them into electrical energy by breaking the limits set by the MPTT, as well as opening a route towards batteryless power autonomy.</p></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":null,"pages":null},"PeriodicalIF":7.1,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142117359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Light energy harvested flexible wireless sensing for disinfection sterilization in food storage 用于食品储藏消毒灭菌的光能采集柔性无线传感技术

IF 7.1 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2024-08-31 DOI: 10.1016/j.seta.2024.103952

{"title":"Light energy harvested flexible wireless sensing for disinfection sterilization in food storage","authors":"","doi":"10.1016/j.seta.2024.103952","DOIUrl":"10.1016/j.seta.2024.103952","url":null,"abstract":"<div><p>Cold chain logistics involves all aspects of food storage, transport, and sales. This study focuses on innovating cold storage disinfection within this context. Regular disinfection reduces microorganism growth, improves food quality, and ensures safety. Traditional methods lack automation, accurate monitoring, and responsive control. Conventional sensors are unsuitable for curved bottles and need frequent power changes. This paper proposes a light energy harvested flexible wireless sensing for disinfection sterilization in food storage (FLWDS). FLWDS comprises five parts: light energy harvesting and power supply node (LEPN), sensing node, control node, monitoring node, and host computer. A predictive control model improves response speed and accuracy. Bluetooth technology ensures real-time communication between nodes. FLWDS collects light energy inside the cold store as a supplementary energy source and can be used in curved structures with a response time of less than 1 s. The maximum communication distance is 40 m. The flexible level sensing system can be designed according to the induction pad’s length, with a measurement accuracy of 0.3 mm, sampling every 4.8 ms, and a resolution of 0.2 mm. FLWDS provides self-powered flexible wireless sensing, ensuring accurate liquid level measurement, improved food quality, reduced pollution, and increased sustainability.</p></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":null,"pages":null},"PeriodicalIF":7.1,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142095080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Benefits and challenges in deployment of low global warming potential R290 refrigerant for room air conditioning equipment in California 在加利福尼亚州室内空调设备中使用全球升温潜能值较低的 R290 制冷剂的益处和挑战

IF 7.1 2区工程技术

Sustainable Energy Technologies and Assessments Pub Date : 2024-08-28 DOI: 10.1016/j.seta.2024.103937

{"title":"Benefits and challenges in deployment of low global warming potential R290 refrigerant for room air conditioning equipment in California","authors":"","doi":"10.1016/j.seta.2024.103937","DOIUrl":"10.1016/j.seta.2024.103937","url":null,"abstract":"<div><p>High global warming potential gases (“high GWP”) are the fastest growing sector of greenhouse gas emissions in the world and in California and are primarily used as refrigerant gases in refrigeration and cooling equipment. Hydrofluorocarbons (HFCs) refrigerants are the dominant type of high GWP gases with GWP values thousands of times larger than CO<sub>2</sub> on a 100-year timescale. Refrigerant-grade propane (“R290”) has a very low GWP (GWP = 3.3) with good thermodynamic properties and good cooling equipment performance but the flammability of any leaked refrigerant makes equipment design, handling, and maintenance critical factors to manage. This paper focuses on the potential climate benefits and costs of transitioning to R290 refrigerant in small room air conditioning (AC) units, specifically window AC, packaged terminal AC/heat pumps (PTAC/PTHP), and mini-split heat pumps. Overall climate impact for a transition to all three types of air conditioning units in the 2022–2051 timeframe is found to be from 15 to 64 million metric tons of greenhouse gas (GHG) savings in California with a cost of saved CO<sub>2</sub>eq that ranges from $14.50 per ton of CO<sub>2</sub>eq saved to −$50.30 per ton of CO<sub>2</sub>eq saved (net savings) depending on whether the baseline refrigerant is R32 or R410A and depending on the relative energy efficiency for R290 units compared to baseline units.</p></div>","PeriodicalId":56019,"journal":{"name":"Sustainable Energy Technologies and Assessments","volume":null,"pages":null},"PeriodicalIF":7.1,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2213138824003333/pdfft?md5=a53d0cc54344d707dadd63bea58c17b4&pid=1-s2.0-S2213138824003333-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142086772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0